One-dimensional optical imaging with a volume holographic optical element

Abstract

We propose a novel imaging structure based on a volume holographic optical element that allows one-dimensional optical imaging through a specific Bragg window. The lateral magnification is shown to be linear and negative. Lateral magnifications of 2.5, 5, and 10 of the imaging element are demonstrated theoretically and experimentally.

Diffraction in a volume hologram made simple

“…The VOHIL model is especially useful in figuring out the Bragg selectivity. For example, assume that the reference light is a spherical wave 90 o deviated from the signal [31][32][33], and the distance between the point source and volume hologram is z o , as shown in Fig 2 [32,33]. In the reading condition, if the point source of the spherical wave is laterally shifted with an amount Δx, Eq (4) can be rewritten [21] as,…”

An edge-lit volume holographic optical element for an objective turret in a lensless digital holographic microscope

“…However, the essential advantage of holography lies in its wave-front generation capability, and it has proved a useful method to generate a designed or targeted wave-front by diffraction [2][3][4][5][6][7][8][9] . Among these holographic technologies, the volume holographic optical element (VHOE) [10][11][12][13] is special in terms of its optical properties. Strict Bragg conditions lead to holographic multiplexing, i.e., effective diffraction only occurs when the incident wave-front and the wavelength of the reading beam are the same as the reference beam in the recording process 14,15 .…”